>Thanks for the hint, but I've already looked there. There is nothing that looks like File properties, nor can I find the names of those properties by their name. Any other idea?

Check out the BuiltinDocumentProperties collection for your workbook and documents. Example:

Excel
ActiveWorkbook.BuiltinDocumentProperties("Author").Value = "My Name Here"

Word
ActiveDocument.BuiltinDocumentProperties("Author").Value = "My Name Here"

It is relatively obscure in the VBA help. Maybe Della and Tamar covered it better in their book.